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No overdrive 1999 jeep grand cherokee limited

Did shifts fine in all gears, but did not go into overdrive ; took transmission apart~ looks great; changed all filters and fluids; NOW after putting it back together it will Not Shift into Any Gear - waiting to be towed to transmisson shop - Could it just be a sensor? I read a post that just needed a $17 functional speed sensor. Could the computer need reprogrammed? When if ever woulod you need to disconnect the computer? I just bought it - it had been sitting for months; had some corroded rusty fuses and right tail light module which i replaced. put on new shocks, tie rods, rear brakes, all rotors and a sticking rear caliper. Also the passenger blower works but there is No Heat on that side.

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 55 Answers

SOURCE: fault code P0720

code po720 is the output speed sensor malfunction

Posted on Jan 29, 2009

  • 170 Answers

SOURCE: 1998 Plymouth Voyager does not shift to 3rd gear when driving,3.3

It's in limp home mode. You'll have to check wire connections and electronic controls. If it has a vacuum modulator you can remove it and look for trans fluid on the vacuum hose side (meaning ruptured diaphram). Double check the parts you replaced as well, especially if they were used parts. My dad went through three speed sensors in one year on his Caravan. You should drop the pan after checking other components. It could be a bad relay, shorted module or wire. The three speed transmissions are much more reliable than the four speed overdrive transmissions but with age and miles things can go wrong and parts will wear out.

Posted on Feb 07, 2009

  • 6982 Answers

SOURCE: 2000 jeep grand cherokee limited starts in 3rd gear

oil pressure problem should be checked independently of other problems...Use a good accurate mechanical gauge to check. If pressure is good (no less than 15psi at idle hot (I prefer to see at least 20) check dash grounding, block ground and if OK, change sending unit. Dash and body ground can influence operation of shift and body control modules so indirectly your problem may or may not be related, depending upon what you find while testing. And it could turn out to be a defective module! They are expensive and just plugging new ones in may work, but then again, it might not. I might be totally incorrect on this...that's the value of actually being there instead of doing this by "remote control".
If you read the numerous posts pertaining to all vehicles, you will see that you are not alone with electrical problems...As long as the engineers who design this stuff, keep using "modules" to replace ordinary simple and reliable systems, we will continue to have these problems. Do some testing and I'm sure you will find a solution! (I'm still waiting for someone to make a program for a PC that will give a complete readout of every system in a vehicle, including exact faults instead of general system "suggestions")
Good luck

Posted on Apr 07, 2009

rockitman187
  • 2559 Answers

SOURCE: 2001 eddie bauer ford expedition 4x4 no prior

Input or output speed sensor,Incorrect fluid or fluid level,neutral safety switch,or TCM (transmission control module)

Posted on Jul 26, 2009

techbuster
  • 5081 Answers

SOURCE: shift indicator light 1999 Jeep Grand Cherokee

There are two parts to it, a voltage resistor, and the EL panel itself.

You need to remove the console first. There are 2 screws under the front rubber pad, two under the cup holder, two in the bin. Remove those six first, take the storage bin out, then slide the rear cupholder out, remove the two screws under the cup holder, and one in front of it.

There are a total of 6 flat screws, and 3 self tapping screws you have removed.

Put the parking brake on, shift the tranny to N, and the transfer case to the middle position if equipped.

Remove the entire console. Slide the shifter beezel as far up vertically as you can. There are 4 clips you ned to remove to do it.
You will see a blue and black wire running into the back. Follow those wires to the resistor. You will see a transparent EL panel attatched to the resistor by two clips.

Usually, one or both of these clips has come loose, causing the light to work intermittantly. Clip them back on, and turn on the headlights to confirm that the light works correctly now.

Re-install everything in the opposite order.

Posted on Oct 11, 2009

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1994 jeep 42re transmission shifting problem


I'm having a problem with my tranny not wanting to shift automatically at all. Seems like a dead stop its stuck in low gear. Have to manually shift and does not go into overdrive. I have a 1993 Jeep Grand Cherokee. Can anyone help me cause I've swiched out throttle control sensor, filter change, new tranny cooler and heavy duty lines. I'm at a loss and scratching my head. Any advice would be greatly appreciated

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My 2001 jeep grand cherokee wont shift into 4th it only goes to third what would cause the 4th gear to not engage


There are several things that could cause that.
> Replacement transmission not equipped with overdrive
> Overdrive solenoid in replacement transmission defective
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Since you have a computer-controlled transmission, it would be better to ask the onboard computer that question....you will probably get a much more definitive answer.

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I have a 1999 grand cherokee. The check engine light came on with a P1768 code. If I keep the trans in the "drive" position and start off, it feels like the transmission is in 3rd gear. No...


Hi, Your like your jeep is in limp in mode, this is to keep you from burning up transmission and to get you some were off the road, the p1768 code means A/T Transmission Relay Output Always Off. This should be checked out by your local shop or dealer. but you should make sure that the fluid level is correct, if to low there is not enough fluid pressure for the solenoid's to engage the relays. Hope this can help you out. If i can help you anymore fell free to re post.
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Check your transmission fluid level to make sure the appropriate amount of fluid is in. Some transmissions will **** or cut the vechicle off if not enough fluid is in the transmission.

Nov 27, 2010 | 1999 Jeep Grand Cherokee

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Replaced transmission seal then on 2 different occasions going down highway at bout 65 to 70 miles hour transmission kept shifting btween overdrive n drive come to a stop n take off didnt do it again...


Computer controlled transmissions can get confused at times, from my personal experience. If the problem doesn't happen again, I would ignore it. If it happens all the time, it's most likely the transmission computer. Other things could be the shift linkage, engine vacuum leak, speed sensor, etc... Hope this helps.

Sep 27, 2010 | 1999 Jeep Grand Cherokee

1 Answer

My 1995 Jeep Grand Cherokee transmission slips in overdrive


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If the condition does not change within a week, likely you will need better diagnosis from a reputable trans shop.

Jun 03, 2010 | 1995 Jeep Grand Cherokee

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You need to have the vechicle scanned for codes.I believe you are going to limp in mode on the computer.Have them check all codes,transmmission and body along with engine.

Apr 16, 2010 | 1999 Jeep Grand Cherokee

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94 jeep grand cherokee will not shift into overdrive


My 97 Jeep Grand Cherokee was doing the same thing. I changed the TPS ( Throttle Position Sensor) Now it is great goes into overdrive fine. It is really easy to change.

Jan 27, 2009 | 1994 Jeep Grand Cherokee

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